/* BSD 3-Clause License
 *
 * Copyright (c) 2017, Louis Jenkins <LouisJenkinsCS@hotmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     - Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     - Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 *     - Neither the name of Louis Jenkins, Bloomsburg University nor the names of its 
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package dsllanguage.ASTNodes;

import dsllanguage.DSLLexer;

/**
 * The addition (+) operator...
 * 
 * String + String => "Hello" + " World" = "Hello World"
 * String + Integer => "Hello " + 3 = "Hello 3"
 * Integer + Integer => 1 + 1 = 2
 * @author Louis Jenkins
 */
public class AdditionBinaryASTNode extends BinaryASTNode {

    
    public AdditionBinaryASTNode(ASTNode left, ASTNode right) {
        super(left, right);
    }

    @Override
    protected Object op(Object left, Object right) {
        if (left instanceof String) {
            return (String) left + right;
        } else if (right instanceof String) {
            return left + (String) right;
        } else if (left instanceof Integer && right instanceof Integer) {
            return (Integer) left + (Integer) right;
        } else {
            DSLLexer.yyerror("Bad Operand Types: " + left.getClass().getName() + " and " + right.getClass().getName());
        }
        
        return null;
    }

    @Override
    public String toString() {
        return "+";
    }
    
    
    
}
